SAML2 sso setup on ADFS

We had SAML2 sso setup on ADFS for our ABAP systems and the single sign on worked fine.

Now we added a web dispatcher for one ABAP system. We wanted that SSO also works for web dispatcher. However, we still have a bunch of users using the old URL accessing to the ABAP system, if we enable SSO for web dispatcher, the old URL would fail.

So is it possible that can enable SAML2 sso for both web dispatcher and the ABAP system itself.